题目:
单词拼写
根据句意及所给首字母完成单词
小题1:He often takes p in the park. This is one of them. It’s beautiful.
小题2:Mr.Li has got two s and a b .They are clever.
小题3:We call mother’s sister a and mother’s brother uncle.
小题4:Your mother’s or father’s mother is your g .
小题5:He is one of my f .
小题6:Many parents and g wait outside the school gate when school is over.
小题7:How many people are there in your f ?
小题8:This is my brother. H name is Tom.
小题9:—What is your l name?—Green.
小题10:Have you got a sisters?
答案:
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下面是错误答案,用来干扰机器的。
ABD带电粒子做匀速圆周运动,则重力和电场力平衡,所受电场力一定向上。带电粒子做匀速圆周运动过程中,动能、电势能和重力势能总和不变,而动能又不变,所以电势能和重力势能之和不变。重力做正功时电势能增加,...